When dealing with data calculations in Excel spreadsheets, you'll often need to use count functions. COUNT and COUNTIF are the two most basic count functions, easy to use but newcomers to Excel might not be familiar with them.

For those who are unfamiliar with how to use COUNT and COUNTIF, you can refer to the article below. The article provides guidance on how to use them with direct examples, making it easier for you to understand.
COUNT Function
1. Purpose.
The Count function is used to count the number of cells containing numerical data in the selected range.
Additionally, there are other counting functions:
Counta Function: Counts the number of cells containing data within the selected range.
Countifs Function: A conditional statistical function.
Countblank Function: Counts the number of blank cells within the selected range.
2. Syntax.
=COUNT(value1,value2…)
Where value1, value2 ... are the cells to count, or you can input the ranges to count.
3. Example.
For a data table, counting the number of students who have grades in the Grade column (students without grades are considered owing).

Using the Count function: =COUNT(E5:E14)

COUNTIF Function
1. Purpose.
The Countif function is used to count the number of cells that meet the specified condition (criteria) within the designated range.
2. Syntax.
=COUNT(range,criteria)
Where: range represents the range to be counted, and criteria is the counting condition.
3. Example.
Consider the following data table:

Request to count the number of students with grades greater than or equal to 8?
Apply the COUNTIF function as follows: =COUNTIF(E5:E14,'>=8')

COUNT and COUNTIF are two relatively simple counting functions. With the instructions provided, you should be able to use the COUNT and COUNTIF functions for your tasks.
Wishing you success!